Setting up a timer to round robin pool members

Need some guidance. I have a VIP with two pool members. I need to set them up with a timer of one hour each. Traffic will go to one pool member one hour and then flips to the other pool member the next hour and continues to do that. I saw this on DevCentral am I going in the right direction:

when CLIENT_ACCEPTED { set curtime [clock seconds] set formattedtime [clock format $curtime -format {%H:%S} ] log "the time is: $formattedtime" }